Electric light for burglar-alarms



(No Model.) 2 Sheets-Sheet 1. O. E. BUELL. Electric Lights for Burglar Alarms.

No. 232,678. v Patented Sept. 28, I880.

N. PETERS. PHOTWUTHOGRAPNER. WASHINGTON. D C.

(No Model.) 7 2 Sheets--Sheet 2:

O. E. BUELL.

ElectrioLights for Burglar Alarms.

No. 232,678. Patented Sept. 28,1880.

I UNITED STATES PATENT OFFICE.

CHARLES E. BUELL, OF NEW HAVEN, CONNECTICUT.

ELECTRIC LIGHT FOR BURGLAR-ALARMS.

SPECIFICATION formingpart of Letters Patent No. 232,678, dated September 28, 1880.

Application filed March 11,1880. (No model.)

To all whom it may concern Be it known that I, CHARLES E. BUELL, of the city and county of New Haven, State of Connecticut, have made certain new and useful Improvements in Electrical Illumination, of which the following is a specification.

My invention relates to controlling electric lamps, and is applicable in dwellings, stores, banks, and other like places.

The object of my invention is to make electric lamps operative or bringthem into action by means heretofore extraneous to electric lamps and a further object of my invention is to combine electric lamps with electric alarms.

I accomplish the object of my invention by connecting the wires which are to convey the currents to illuminate the lamps with the windows and doors of an apartment, or with the door of a vault, or with concealed keys or analogous appliances in or about a vault, safe, or

' room to be protected against intrusion, by such means and in such a manner that the opening of such door or window will bring the desired lamps into action by closing-a circuit normally open or by rupturing a circuit whiclris normally closed, preferably the latter.

Figure 1 represents a simple form of key, composed of a spring, S, which, in its normal position, rests against the contact-piece C, which completes a circuit through the wires ff, both the spring S and piece C being metal. The pin 12 is intended to be attached toa door or window, which, when closed, brings the pin 19 against the spring S, forcing it away from the piece C and against the point T, which is a terminal of a branch circuit, to be described hereinafter.

Fig. 2 represents the parts shown in Fig. 1, and described as attached to the window W 'and door D, both being represented asnot fully closed.

Fig. 3 represents a main electric circuit, in

- The raising of the window W or the opening of the door D serves to release the spring S, which'is held depressed while the door or window remains closed. The spring S, being released, comes into contact with piece C, putting the current through the lamps L L, over the wiresf f making them luminous.

The resistance R can'be placed in the wire h to make the circuit the same as the circuit containing the lamps in pointof conductivity.

The resistance B may be any conductingresistance, or may be an electro-magnet used to strike a. bell or control any branch wire or actuate or control an alarm mechanism.

Any of the well known appliances used to control burglar-alarms may be employed in place of the spring S and piece C, shown and described for controlling electric lamps.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a system of electric illumination, the combination, with a circuit-wire which includes one or more electric lamps, of an auxiliary circuit-wire which includes circuit-changing keys controlled and operated by doors and windows, and means for switching the main circuit through or around the lamps.

2. In a system of electric illumination, the combination, with a circuit-wire which includes one or more electric lamps, of an auxiliary circuit-wire which is controlled and operated by doors and windows, and which is made equal in conductivity to the circuit-wire which includes the lamps.

3. In a system of electric illumination, the combination, with aoircuit-wire which includes one or more electric lamps, of an auxiliary circuit whiclrincludes an electro-magnet for controlling and actuating alarms and alarmcircuits, and. means for automatically controlling said auxiliary circuit to make operative the lamps and alarms simultaneously.

CHARLES E. BUELL.

Witnesses JAMES G. CLARK, CHAS. R. SPIEGEL. 

